Spring 3 @Autowired throws NPE in Formatter

i've written my own formatter and tried to autowire service into it, but i'm getting NullPointerException.

Formatter:

@Component
public class DepartmentFormatter implements Formatter<Department> {

    @Autowired
    private DepartmentService departmentService;

    @Override
    public String print(Department department, Locale locale) {
        return department.getName();
    }

    @Override
    public Department parse(String string, Locale locale) throws ParseException {
        return departmentService.getByName(string); // NPE thrown here
    }
}

Service:

@Service
@Transactional
public class DepartmentServiceImpl implements DepartmentService {

    @Autowired
    private DepartmentDAO departmentDAO;

    /* ... */
}

In my spring-servlet.xml i've got

<context:annotation-config />
<context:component-scan base-package="net.kurochenko.sampleapp" />

Registering of formatters:

public class FormattingFactory extends FormattingConversionServiceFactoryBean {

    @Override
    public void installFormatters(FormatterRegistry registry) {
        super.installFormatters(registry);
        registry.addFormatterForFieldAnnotation(new AuthorAnnotationFormatterFactory());
        registry.addFormatterForFieldAnnotation(开发者_C百科new DepartmentAnnotationFormatterFactory());
    }   
}

FormattingFactory bean

<mvc:annotation-driven conversion-service="formattingFactory" />

All aforementioned classes are inside net.kurochenko.sampleapp package.

Autowiring service in @Controller works fine. I was searching for solution on google and tried some of them, but exception still remains. What am I doing wrong? Thanks for advises.

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You are most likely registering your formatter with new DepartmentFormatter(). It won't work that way - spring doesn't get the chance to inject dependencies.

You should register the spring bean instance (created by spring). Be it programatically or via xml.